/*
 * Copyright (C) 2017-2019 Dremio Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.dremio.exec.planner.sql.handlers;

import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.RelVisitor;

import com.dremio.exec.planner.logical.FlattenRel;

class FlattenRelFinder extends RelVisitor {
  private boolean found = false;

  public boolean run(RelNode input) {
    go(input);
    return found;
  }

  @Override
  public void visit(RelNode node, int ordinal, RelNode parent) {
    if (node instanceof FlattenRel) {
      found = true;
    }
    super.visit(node, ordinal, parent);
  }
}
